US Bridges

CR 350E over Koselki Ditch

Fair

Porter County, Indiana · 01.00 SW JCT US 6 · Structure no. 6400103

Built
1940
85 years old, rebuilt 1979
Condition
Fair
inspected May 2024
Type
Slab
Concrete
Length
34 ft
1 main span
Daily traffic
170
2018 count
Owner
County
County Highway Agency

About this bridge

CR 350E over Koselki Ditch is a concrete slab carrying CR 350E over Koselki Ditch in Porter County, Indiana. It was built in 1940 and reconstructed in 1979, so it is 85 years old, older than the Indiana average of 46.6 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 170 vehicles a day, roughly 6% of them trucks, projected to reach 320 by 2038. The structure is 34 ft (10.3 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCR 350E
CrossesKoselki Ditch
Location01.00 SW JCT US 6
RouteCounty Highway 61
CountyPorter County
StateIndiana
Coordinates41.54207, -87.00347
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating46.6 US tons
Inventory rating35.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length34 ft (10.3 m)
Longest span23 ft (7.1 m)
Deck width23 ft (7 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2018)
Projected traffic320 by 2038
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 350E over Koselki Ditch built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1979.

What condition is CR 350E over Koselki Ditch in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2024.

How much traffic does CR 350E over Koselki Ditch carry?

About 170 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is CR 350E over Koselki Ditch?

The structure is 34 ft (10.3 m) long with a longest span of 23 ft (7.1 m) and a deck 23 ft wide.

Who owns CR 350E over Koselki Ditch?

It is owned by the County Highway Agency.